cisco-sa-anyconnect-pos-dll-ff8j6dFv: Cisco AnyConnect Secure Mobility Client for Windows with VPN Posture (HostScan) Module DLL Hijacking Vulnerability
First published: Wed Jun 16 2021(Updated: )
A vulnerability in the DLL loading mechanism of Cisco AnyConnect Secure Mobility Client for Windows could allow an authenticated, local attacker to perform a DLL hijacking attack on an affected device if the VPN Posture (HostScan) Module is installed on the AnyConnect client. This vulnerability is due to a race condition in the signature verification process for DLL files that are loaded on an affected device. An attacker could exploit this vulnerability by sending a series of crafted interprocess communication (IPC) messages to the AnyConnect process. A successful exploit could allow the attacker to execute arbitrary code on the affected device with SYSTEM privileges. To exploit this vulnerability, the attacker must have valid credentials on the Windows system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-anyconnect-pos-dll-ff8j6dFv
Credit: Marcos Accossatto Core SecurityPablo Zurro Core Security
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco AnyConnect Secure Mobility Client |
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Reference Links
Frequently Asked Questions
What is the severity of cisco-sa-anyconnect-pos-dll-ff8j6dFv?
The severity of cisco-sa-anyconnect-pos-dll-ff8j6dFv is classified as high due to the potential for a DLL hijacking attack.
How do I fix cisco-sa-anyconnect-pos-dll-ff8j6dFv?
To fix cisco-sa-anyconnect-pos-dll-ff8j6dFv, update the Cisco AnyConnect Secure Mobility Client to the latest version provided by Cisco.
Who is affected by cisco-sa-anyconnect-pos-dll-ff8j6dFv?
Users of the Cisco AnyConnect Secure Mobility Client for Windows with the VPN Posture (HostScan) Module installed are affected by cisco-sa-anyconnect-pos-dll-ff8j6dFv.
Is cisco-sa-anyconnect-pos-dll-ff8j6dFv a remote or local vulnerability?
cisco-sa-anyconnect-pos-dll-ff8j6dFv is a local vulnerability that requires authentication on the affected device.
What type of attack is associated with cisco-sa-anyconnect-pos-dll-ff8j6dFv?
cisco-sa-anyconnect-pos-dll-ff8j6dFv is associated with a DLL hijacking attack.
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